**Extra Help tomorrow after school** **Quiz Friday (1.12 ...€¦ · complete rotation on its axis...
Transcript of **Extra Help tomorrow after school** **Quiz Friday (1.12 ...€¦ · complete rotation on its axis...
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October 11, 2017Lesson 1.16 - Rotations on the Coordinate Plane
**Extra Help tomorrow after school****Quiz Friday (1.12 to 1.17)**
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HW
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http://www.mathwarehouse.com/transformations/rotationsinmath.php
Demonstration to determine the rules of Rotations!
Let's pick a point to see where it goes after a rotation of 90, 180, and 270 degrees.
R90 ( ) ( )
R180( ) ( )
R270( ) ( )
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http://www.mathwarehouse.com/transformations/rotations-in-math.php
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Rorigin,270 (x, y) --> (y,-x)
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*Switch and make first one opposite sign*
Rorigin,90 (x, y) --> ( )Rorigin,180 (x, y) --> ( )Rorigin,270 (x, y) --> ( )
Rorigin,0 (x, y) --> ( )*Clockwise (to right)*
-90 = 270-180 = 180-270 = 90
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